苎麻属植物资源的搜集、保存与开发利用     

陈晓蓉  廖志强 《中国麻业》2007,29(6):308-312

1995年以来,我所在我国长江流域及以南14个省(市)、自治区搜集到荨麻科植物资源222份,其中苎麻属130份,分属19个种7个变种。根据形态特征,将已搜集到的苎麻属植物划分为腋球苎麻组、帚序苎麻组、苎麻组、序叶苎麻组和大叶苎麻组五个组。苎麻属植物的种群分布与海拔高度有关,按其生态特点可分为湿生性、湿中性、半阴湿性和旱生性四大生态类型。来自于不同地域、不同气候和生态环境的苎麻属植物,异地保存时有的不易成活,建圃保存时要从水分、光照、温度上创造有利条件,满足其生长发育需要。  相似文献   

我国渔业发展战略研究现状分析与初步思考   总被引：1，自引：0，他引：1  

岳冬冬  王鲁民 《中国农业科技导报》2013,15(4):168-175

从我国渔业发展的历程来看,战略决策对渔业产业发展具有重要的导向作用。随着经济社会的不断发展,渔业已经从单一的产品供给功能扩展到五项功能特征;而根据产值统计分析发现,渔业在“大农业”与“海洋经济”中的地位不仅偏低,且呈现逐步下降趋势,但渔业在保障国家粮食安全、争取海洋权益等方面仍具有无可替代的重要地位,因此,唯有发挥战略引导作用才是改变渔业处境的重要途径。在对海洋经济与发展战略研究平台、取得成果分析基础上,类比渔业经济发展战略研究现状,发现目前渔业经济与发展战略研究工作存在资源整合优势不明显、专职研究人员少、研究成果质量偏低以及研究缺乏系统性等问题,为了提升渔业发展战略研究水平,认为应从不同的渔业分类方式入手,结合水产品质量安全管理战略、生态渔业发展战略、低碳渔业与碳汇渔业发展战略、渔业响应气候变化发展战略等四大迫切性战略问题开展相应研究工作,以提高渔业发展战略研究工作的系统性,最终起到为现代渔业发展导航的作用。  相似文献   

基于突显海洋水产特色的食品微生物学课程教学改革与实践     

刘唤明  雷晓凌  刘颖  徐德峰  王玲  曾少葵  叶日英  伍彬 《安徽农业科学》2013,(20):8788-8789

结合食品微生物学课程的教学实践,通过精选教学内容、改进教学方法及参观实践教学基地等措施,探讨了食品微生物学课程的教学改革。  相似文献   

山东半岛蓝色经济区海岛休闲渔业开发评价   总被引：1，自引：0，他引：1  

李伟  江秀辉 《广西农业科学》2013,(11):1932-1936

[目的]对山东半岛蓝色经济区海岛休闲渔业的开发状况进行评价,并提出进一步的开发策略,为海岛休闲渔业健康发展提供参考.[方法]运用综合归纳法构建海岛休闲渔业开发的评价模型树,采用层次分析法对山东半岛蓝色经济区海岛集中的青岛、烟台、威海和日照4个有代表性地区的休闲渔业开发状况进行评价.[结果]山东半岛蓝色经济区4个有代表性地区海岛休闲渔业开发评价的综合得分高低次序为：青岛＞烟台＞威海＞日照,表明在山东半岛海岛休闲渔业开发最好的是青岛,之后依次是烟台、威海和日照;就海岛休闲渔业开发综合得分的级别而言,青岛和烟台得分在30～40,属于Ⅱ级,威海和日照的得分在20～30分,属于Ⅲ级;海岛休闲渔业开发综合得分较高的青岛和烟台也仅30多分,说明山东半岛蓝色经济区海岛休闲渔业的整体发展水平仍然偏低;就开发条件而言,即使分数最低的日照也达到22.5078分,但就开发水平而言,仅烟台和青岛在7.5000分以上,表明这4个地区满足休闲渔业的开发条件,但其开发水平有待提高.[建议]应积极修复海洋渔业资源、构建现代综合交通网络、制定合理的发展规划、健全相关的法律和法规、拓展休闲渔业资金来源、开发和设计有特色的休闲渔业产品,以促进山东半岛蓝色经济区海岛休闲渔业的健康发展.  相似文献   

葛产业发展与食物安全     

李志纯 《湖南林业科技》2013,(5):1-3

从食物安全角度出发,阐述了开发葛产业的重要意义;分析了湖南开发葛产业的突出优势;明确了开发葛产业的基本思路;提出了开发葛产业的主要措施。  相似文献   

The Selection of Candidates for Training in Forestry in Lesotho     

W. R. Long 《Southern Forests》2013,75(1):51-53

The need for careful selection of candidates for training in forestry as a first step in that training, is accented.

The perhaps unique selection process followed in Lesotho is described.  相似文献   

Consequences of changing climate and geomorphology for bioenergetics of juvenile sockeye salmon in a shallow Alaskan lake     

Jennifer R. Griffiths  Daniel E. Schindler 《Ecology of Freshwater Fish》2012,21(3):349-362

Abstract – In high northern latitudes, a wide range of geomorphic processes associated with fluvial, glacial and permafrost activity may interact with climate change to produce unexpected changes in lake thermal regimes with attendant effects on ecological processes. We coupled output from a hydrodynamics model of lake thermal structure to a bioenergetics model to assess how alternative scenarios of climate change, geomorphic evolution and habitat restoration in a shallow Alaskan lake may affect juvenile sockeye salmon bioenergetics and growth. In particular, we evaluated the metabolic costs of different thermal regimes and the potential for changes in consumption to offset those costs. Increased water temperatures associated with future climate increased metabolic costs which were partially offset if fish were able to maintain feeding rates, expressed as a constant proportion of maximum consumption. In this lake, water levels have declined substantially in the last 50 years. Simulated restored lake level had negligible effects on lake temperature and thus on sockeye salmon growth when compared to current conditions. Maintaining lake connectivity to inlet tributaries (cooling lake temperature) was crucial in reducing sockeye salmon metabolic costs particularly with further drops in lake level and climate warming. While considerable research is focused on predicting future thermal and geomorphic conditions in aquatic ecosystems, these processes are rarely considered together, especially for lakes. Understanding the biological responses to geomorphic–climate interactions will be required for developing scenarios for coping with ecosystem responses to global change and evaluating restoration alternatives, especially in high‐latitude systems that support economically and culturally important fisheries.  相似文献   

Effects of flood and drought events on multi‐species,multi‐method estuarine and coastal fisheries in eastern Australia     

J. GILLSON  I. SUTHERS  J. SCANDOL 《Fisheries Management and Ecology》2012,19(1):54-68

Abstract Multivariate patterns in commercial fisheries landings, effort and revenue from three adjacent estuarine and coastal systems were examined in eastern Australia between 9‐month periods of flood (September 2000–May 2001) and drought (September 2002–May 2003). Patterns in species landings, methods of fishing effort and revenue per species were significantly different between flood and drought. Spearman’s rank correlations between Bray–Curtis similarity matrices for landings, effort and revenue indicated that patterns in fisheries metrics represented a mixed signal of ecological response and fishers’ harvesting behaviour. Flood and drought events were associated with shifts in the species composition of landings that were reciprocated between estuarine and coastal systems. Estuarine migrant species (e.g. school prawn Metapenaeus macleayi Haswell) primarily contributed to landings during flood, whilst marine estuarine‐opportunist species (e.g. yellowfin bream Acanthopagrus australis Owen) primarily contributed to landings during drought. Flood and drought events redistributed fisheries resources between estuarine and coastal systems, modifying the bioeconomic productivity of commercial fisheries. Results indicated that flood and drought events influence commercial fisheries by modifying landings composition, fishers’ harvesting behaviour and revenue generation.  相似文献   

沧源高峰黄牛牛干巴产业开发现状与前景浅析     

甘胜磊 《中国牛业科学》2011,37(2):66-68

沧源高峰黄牛是产于云南省临沧市沧源佤族自治县的特有黄牛物种,采用高峰黄牛肉制作的牛干巴在营养价值、风味口感、卫生品质等方面有独特的开发前景.本文论述了沧源高峰黄牛牛干巴产业在各方面的开发价值,以及相关研究的现状,并从营养和健康相结合的角度对沧源高峰黄牛牛干巴产业的利用前景进行了探讨.  相似文献   

桑的药理性质及其开发利用   总被引：2，自引：0，他引：2  

罗蔓 《现代农业科技》2010,(24)

对桑(包括桑叶、桑椹、桑枝、桑白皮)的药理性质及其开发利用进行综述。针对四川省凉山州实际情况,指出应将重点放在桑副产物桑枝的药用开发研究、果叶两用桑园的建立及桑椹系列保健产品的开发研究上,以提高桑园的综合效益。  相似文献